Ask your own question, for FREE!
Mathematics 7 Online
OpenStudy (anonymous):

Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!